blob: c559a7267704ee6826519c61ef06902d1f79e717 [file] [log] [blame]
/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.paging
@Suppress("DEPRECATION")
internal class RecordingCallback : PagedList.Callback() {
private val list = mutableListOf<Int>()
override fun onChanged(position: Int, count: Int) {
list.add(Changed)
list.add(position)
list.add(count)
}
override fun onInserted(position: Int, count: Int) {
list.add(Inserted)
list.add(position)
list.add(count)
}
override fun onRemoved(position: Int, count: Int) {
list.add(Removed)
list.add(position)
list.add(count)
}
fun dispatchRecordingTo(other: PagedList.Callback) {
for (i in 0 until list.size step 3) {
when (list[i]) {
Changed -> other.onChanged(list[i + 1], list[i + 2])
Inserted -> other.onInserted(list[i + 1], list[i + 2])
Removed -> other.onRemoved(list[i + 1], list[i + 2])
else -> throw IllegalStateException("Unexpected recording value")
}
}
list.clear()
}
companion object {
private const val Changed = 0
private const val Inserted = 1
private const val Removed = 2
}
}